The CS1290S is a high quality single 12” two-way passive design. It serves as a surround sound source module for larger auditoriums. The CS1290S high frequency section features a high performance PRD500 planar ribbon transducer designed and manufactured by SLS Loudspeakers. The 5" ribbon driver is contained within a 90-degree die-cast aluminum waveguide, rotated so that the 90-degree pattern is in the horizontal plane.